Chicago1

Well having a hard time with this getting different answers. Procharger says 12psi-17psi. The numbers changed the more we talked and after I got off the phone I'm still not sure. I dont want the motor to go pop on the dyno..I could use your help thanks

5600 ft above sea level
8k da usually
only 91 octane
no meth(for now)
3.47" pulley

I am looking for mid to high 500's to the wheel..Which I believe is safe

2001 ls1
d1sc on A&A bracket
4" Dongle(suppose to restric some boost?)
fmic
1 7/8" headers
91 pump
ported tb
6 rib
stock size balancer
stock maf
stock long block 93k or so..
320lph pump
casper fuel harness

joshtownsend

I saw 22.5 last week at 65 ft sea level..

p1bz

Josh, he has a stock balancer. And an air filter, and not the same RPM we run. I'd say 14-15lbs.

master blaster

I think i lost 3-4# of boost when going from sea level to 4500ft elevation.

_zebra

you should see 500hp with only 8-10psi
as for what you'll actually make, i ain't got a clue with a belt-turbo. my 2300 went from 11psi in Houston (65') to 9.5psi in Rapid City (3800')

tcruse

So we are at high altitude and he is wondering what kinda of boost you guys are seeing with this pulley. Like to get some info from people at the higher elevations with prochargers about pulley sizes and procharger doesn't seem to have the answer he's looking for.

kromberg

Here in Colorado at just about the same conditions as yourself, most people see about 2 to 3 less pounds of boost compared to the same setup near sea level.

Chicago1

But what size pulleys are you guys using. Again what will I boost though? I don't wanna be on a dyno going boom or trying to change a pulley and go get a belt. We went from 8psi to 22 psi. Lol that's a huge range

SBCGENII

Check out post #3

joshtownsend

i originally though he was asking what could he get out of it..my bad!!!!

Chicago1

Hmm that may be a little to much me thinks

_zebra

i wasn't saying you'd get 8-10psi from that pulley. you mentioned looking for mid-to-upper 500s & i said 8-10psi should do that for you.

the boost reference i gave from my roots blower was to show you what a 2500' change did on my car

Chicago1

Gotcha thanks for clarifying for me

Enemy

13-14, our elevation sucks ***.

Chicago1

Is that what you have on that Lighting? You have to remember this d1sc flows some air1400cfm from what my man Tcruse just sent. You have stock roots I believe?? What do those flow?I'm gonna pulley up with a 4.5 and go from there. rather be safe then sorry.